不同基原大黄指纹图谱、多成分定量结合多元统计分析的质量评价研究

目的建立3种基原大黄(掌叶大黄、药用大黄、唐古特大黄)指纹图谱和多成分含量测定方法。方法采用UPLC法同时测定51批大黄指纹图谱及14个化学成分含量,并通过指纹图谱相似度分析、聚类分析、主成分分析(PCA)和偏最小二乘法判别分析(PLS-DA)对不同基原大黄药材进行全面质量评价。结果建立了3种基原大黄的指纹图谱,确定了18个共有峰,并指认了14个化学成分;相似度评价结果显示,3种基原大黄相似度存在一定差异,但部分药用大黄与掌叶大黄相似度较高,聚类分析与相似度评价结果一致。通过PCA提取了4个主成分,累积方差贡献率达85.823%;PLS-DA可用于大黄的基原识别,并筛选出6个差异性成分。结论建立的方法简便、可靠,为不同基原大黄药材的质量控制和鉴别提供可靠的分析方法。

The association between admission systolic blood pressure and 1-year mortality in patients with non-ST-segment elevation acute coronary syndrome

Background In patients with acute coronary syndrome（ACS）, lower admission systolic blood pressure（SBP）levels infer a worse prognosis. However, the predictive potential of admission SBP on 1-year mortality has not fully elucidated in patients with non-ST-segment elevation ACS（NSTEACS）. Methods We enrolled 1325 patients to investigate the association between admission SBP in patients hospitalized for NSTEACS. We analyzed the association between admission SBP and 1-year mortality. Admission SBP was categorized as low（〈110 mm Hg）, normal（110-140 mm Hg）, high（141-160 mm Hg）, and very high（〉160 mm Hg）. Results Compared with patients with normal admission SBP, those with low SBP had a significantly increased hazard ratios（HRs） for 1-year mortality of 3.03（P〈0.05）, while patients with high and very high admission SBP had no significantly increased HRs for 1-year mortality. Conclusion Low admission SBP, but not elevated admission SBP, is a strong independent predictor of 1-year mortality in patients with NSTEACS.